在Labeo rohita中TLR7的分子特征和免疫作用
Saswati Pani1, Bristy Ganguly1, Smruti Mahapatra1
1Immunology Laboratory, Fish Health Management Division (FHMD), Indian Council of Agricultural Research - Central Institute of Freshwater Aquaculture (ICAR-CIFA), Bhubaneswar, Odisha, India.
Frontiers in immunology
|May 12, 2025
概括
在Labeo rohita中的托尔类受体7 (TLR7) 对于对病原体和PAMPs的免疫防御至关重要. 它的表达在感染和刺激时显著增加,突出显示TLR7是预防鱼类疾病的关键目标.
科学领域:
- 免疫学 免疫学 免疫学
- 鱼类生物学 鱼类生物学
- 分子生物学分子生物学
背景情况:
- 收费类受体 (TLRs) 对于先天性免疫非常重要,它可以识别病原体相关的分子模式 (PAMPs).
- TLR7对于骨鱼的抗病毒和抗菌防御至关重要,但其连接体相互作用在物种之间尚不完全理解.
- 这项研究研究了Labeo rohita (LrTLR7) 中的TLR7,以了解其在对病原体和PAMP的免疫反应中的作用.
研究的目的:
- 为了识别和描述Labeo rohita TLR7 (LrTLR7) 基因和蛋白质.
- 分析LrTLR7在发育过程中的表达模式,在各种组织中,以及对病原体挑战的反应.
- 通过使用PAMP和特定激动剂来刺激LrTLR7的免疫激活潜力.
主要方法:
- 从Labeo rohita脏组织中克隆和测序LrTLR7基因.
- 遗传学分析以确定LrTLR7.7的进化关系.
- 定量实时PCR (qRT-PCR) 来评估LrTLR7基因表达的响应发育阶段,组织分布,细菌感染 (A. hydrophila,E. tarda) 和PAMP刺激 (LPS,Poly I:C).
主要成果:
- LrTLR7与鱼TLR7的基因相似性最高.
- 在胚胎发育和成人中观察到显著的LrTLR7表达,在细菌感染后,肝脏,粘膜红细胞和PBLs的快速上调.
- 在体内和体外用LPS,Poly I:C,伊米基莫德和加迪基莫德激活LrTLR7强烈,导致IRF7和I型干扰素基因的表达增加.
结论:
- LrTLR7在Labeo rohita对病原体和PAMP的天生的免疫反应中发挥着重要作用,类似于更高的脊椎动物.
- 有特征的LrTLR7是开发免疫刺激策略以预防鱼类疾病的有希望的目标.
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